<p>The heat was already overwhelming and alsted a week, which duration made it seem sheer torture</p>
<p>I was stuck between these two, I eventually picked the right one but not sure what's the correct grammatical reason behind it other than B sounded worse.</p>
<p>b) overwhelming, and because of lasting a week, it made it seem</p>
<p>d) overwhelming, and its lasting a week made it seem</p>
<p>b sounds weird with "because of" but d sounds weird with "its lasting"</p>
<p>Could someone provide grammatical insights on this one?</p>